Stove



(No Model.)

N. J. GRAHAM.

STOVE.

No. 399,030. Patented Mar. 5, 1889 large heat'absorbing surfaces, andthat they UNITED STATES PATENT rrics.

SPECIFICATION forming part of Letters Fatent No. 399,030, dated March 5,1889.

Application filed February 26, 1886. Renewed February 5, 1889 Serial No.298,790. (No model.)

To all whom it may concern.-

Be it known that I, NANCY J. GRAHAM, a citizen of the United States,residing at Jackson,in the county of Jackson and State of 7 Ohio, haveinvented certain new and useful 3 Improvements in Stoves; and I dodeclare the following to be afull, clear, and exact descrip tion of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon,which form a part of this specification.

Figure 1 is a front view showing my improved heating apparatus appliedto a stove. Fig. 2 is a diametrical section through the stove from sideto sitle. Fig. 3 is a top view of the stove-body, showing the hot-airand smoke outlets.

My invention consists in a novel arrangement of air-heating pipes instoves, which will be fully understood from the following description,when taken in connection with the annexed drawings.

A designates the base of the stove, with its hearth a, ash-box b, andash-pan c.

13 designates the grate; G, the fuel-feeding door; D, the body of thestove; D, the cap or top, and E the outlet-collar for the smoke-pipeleading to the chimney.

F F F are the air-heatingconductors, which for description I will divideinto lower exter nal pipes, (Z (Z d, which extend from points below thestove-hearth a, through this hearth, and into the body of the stove, asclearly shown in Fig. 2. These pipes orcooi-air feeders d are suitablyconnected to and communicate with the lower contracted ends of enlargedairheaters e e c, which are of the bulging shape shown in the drawingsand inclined so as to form a contracted space directly above the gratefor partially arresting the ascent of the products of combustion risingfrom the grate.

It will be seen that the heaters e a iiiord very will allow the cool airentering them to expand freely as it becomes highly heated,thusafiording hot-air reservoirs. These heaters,

which are located above the grate, do not detract from the generalappearance or design of the stove, nor do they interfere with supplyingfuel to the grate.

To the upper contracted ends of the airheaters e are suitably attachedpipes f ff, which I make of the tapering or upwardlyfiaring shape shown.in Figs. 1 and 2, for the purpose of affording a large amount ofheating-surface, and also for contracting the passage directly below thesmoke-pipe collar E, and thereby retaining the heated products ofcombustion in the upper part of the body of the stove as long aspracticable. These pipes f pass through the top of the stove, and aredesigned to have connected to them pipes leading to upper or adjacentapartments for warming them and for other purposes where heated air isdesired.

I may apply valves or dampers to the airinlet pipes d, by means of whichthe supply of cool air can be regulated, and, if desired, I may connectthe lower ends of the pipes at with a pipe leading out-of-doors, andthus supply fresh air to the heaters.

The operation of my stove is substantially as follows: The products ofcombustion rising from the bed of fuel are at first contracted about thebulging heaters e, and after rising above the enlarged parts thereof theproducts are expanded and then again contracted as they approach theoutlet E. The reverse of this takes place with the air in its coursethrough pipes F, the air-heaters c, and the upwardly-flaring pipes f.

I am aware that it is not lnoadly new to arrange air-heating drums,rings, and bulging cases in the combustion-chambers of stoves andfurnaces; nor is itbroadly new to conduct air into said receptacles bymeans of pipes entering the wall or bottom of a combustionchamber abovethe grate. I therefore disclaim such devices broadly and separatelyconsidered.

Having described my inventioml claim- 1. The combination, with a stove,of an an nular series of ainheating tubes having contracted upper andlower ends, and bulging intermediate portions arranged in thecombustion-chamber to form a centrally-contracted space for the ascentof the products of combustion, the pipes cl, leading through thestovehearth and through the wall of the stove and communicating with thelower ends of said tubes, and a series of upwardly-flaring pipesconnected to the upper ends of said tubes and leading out of the stovethrough its top, sub; F

stove around the outlet E, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

. NANCY J. GRAHAM. Vitnesses:

EVA GRAHAM, E. C. POWELL.

